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21 December, 07:53

During the period 1985-2012, the projected enrollment B (in thousands of students) in public schools and the projected enrollment R (in thousands of students) in private schools can be modeled by B = - 18.53t2 + 975.8t + 48,140 and R = 80.8t + 8049, where t is the number of years since 1985.

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  1. 21 December, 07:56
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    The equation that models the difference in the projected enrollments for public schools and private schools as a function of the number of years since 1985 is B - R = (-18.53t^2 + 975.8t + 48140) - (80.8t + 8049) = - 18.53t^2 + 975.8t + 48140 - 80.8t - 8049 = - 18.53t^2 + 895t + 40091
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